Improvement in steam-traps



UNITED STATES PATENT OFFICE.

RICHARD T. PASOALL, OF NEW YORK, N. Y.

IMPROVEMENT IN STEAM-TRAPS.

Specification forming part of Letters Patent N0. 206,748, dated August 6, 1878 application filed June 21, 1878.

To all whom it may concern:

Be it known that I, RICHARD T. PASGALL, of New York city, in the county and State of New York, have invented a new and Improved Steam-Trap, of which the following is a specification:

Figure 1 is a "ertieal section of my improved steamtrap. Fig. 2 is a transverse section taken on line as w in Fig. 1'.

Similar letters of reference indicate corresponding parts.

My invention relates to a steam trap of novel construction; and it consists in a casing containing a spherical corrugated sheet-metal float, and having a strainer for preventing the entrance of dirt, and provided with a balanced discharge-valve.

It also consists in a device for lifting the float independently of the action of the water, and also in a guard placed above the float, to carry the water that enters the trap to the side of the casing.

Referring to the drawing, A is a casing, which is nearly spherical in form, and is composed of two sections, a b, which have flanges c, for receiving the bolts by which the two sections are fastened together. The upper section is provided with a flange, d, to which is bolted the flange c, which receives the drippipe. Resting between the edges of flanges d 0 there is a wire-cloth or perforated sheetmetal strainer, f, which prevents the entrance of large solid particles to the trap-casing.

A concave guard, g, is supported in the upper portion of the section a by wings h, so as to leave a passage between it and the inner surface of the upper half of the casin g.

A valve -casin g, 2', is connected with the lower half, I), of the casing A by means of a nipple, c, which is screwed into the dischargea-perture of the casing, and into the top of the valve-casing. The lower end of the valvecasing is threaded internally to receive the discharge-pipe.

The valve-casing contains a cup-valve seat,

j, which is suspended by wings k, and also an annular valve-seat, Z, which rests upon a shoulder, m, formed in the upper portion of the valve-casing.

The valve n consists of a tube, 0, having on its upper end an annular valve, 12, which is fitted to the annular valve-seat Z. An annular valve, q, is screwed on the lower end of the tube 0, and is fitted to the cup-valve seat j. The tube 0, being smaller in diameter than the opening of the annular valve-seat l, admits of the passage of water between the valve-seat and tube.

It will be seen that the upper and lower valves are connected together by the tube 0, and that when the valves are upon their seats the escape of water from the casing A is prevented. The under surface of the lower valve is flaring or bell-shaped, so that the internal diameter of the valve-face is equal to the ex ternal diameter of the upper valve-face, thereby insuring an equilibrium of pressure on the upper and lower ends of the valve, so that little or no power is required to operate it.

A curved yoke, r, connects opposite sides of the valve, and is drilled on the axial line of the valve to receive a spindle, s, which extends upward through the guard g. Upon this spindle is secured a spherical float, B, which is formed in halves of sheet metal, and is corrugated to stiffen it, so that it will resist external pressure. It is also stayed by a tube, which extends axially through it and projections above it, and receives the valve-spindle, which is fastened thereon by a pin that passes through both spindle and tube above the float. Below the float there is a lever, t, which is pivoted to a ring, a, that rests upon the nipple 0 The longer arm of this lever is forked to straddle the spindle s, and its shorter arm projects downward and rests against the inner surface of the ring a.

A spindle, a, having a collar, b, extends through a stufflng-box, 0 in the lower part of the section b, and is provided with a button or knob, d, at its outer end, while its inner end projects through a hole in the ring, and engages the short arm of the lever I. Between the collar b and the ring a a spiral spring, 6, is placed on the spindle a, to force it outward.

By pushing the spindle a the float may at any time be raised so as to open the valve 12, and permit steam and water to flow through the trap. The steam and water, entering the trap, are spread by the guard g, which carries them to the sides of the casing, and thus pre- 2. In combination with a steam-trap, the corrugated spherical sheet-metal float, as herein shown and described.

3. The double-seated tubular valve 21, in combination with the valve-casing 1', having the cup-seat j and seat I, substantially as herein shown and described.

RltIIARD T. PASl A LL.

Witnesses:

(mo. M. IloPKINs, l. SEDGWIPK. 

